Equivalent Beam-Column Method to Estimate In-Plane Critical Loads of Parabolic Fixed Steel Arches
Publication: Journal of Bridge Engineering
Volume 14, Issue 5
Abstract
The objective of this paper is to investigate the characteristics of critical loads for parabolic fixed steel tubular arches. An advanced nonlinearity finite-element program, taking into account the geometric and material dual nonlinearity, is employed. The influence of nonlinearity and initial crookedness on arch critical load is discussed. It is found that the effect of rise-to-span ratio on the critical load of arch is significant. Therefore, a new equivalent beam-column method is proposed for estimating the corresponding in-plane critical loads of arch, in which a buckling factor is employed to consider influence of rise-to-span ratio and a reduction factor to consider the effect of initial crookedness. Pragmatic formulas and tabulated data are provided based on the present different Chinese design codes. It is proved that the presented method is sufficiently accurate to predict the in-plane critical load of parabolic fixed steel arch subjected to compression or to both bending and compression.
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Information
Published In
Journal of Bridge Engineering
Volume 14 • Issue 5 • September 2009
Pages: 346 - 354
Copyright
© 2009 ASCE.
History
Received: Aug 31, 2007
Accepted: Feb 9, 2009
Published online: Aug 14, 2009
Published in print: Sep 2009
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